By the time I left Benning, I was sure two Roach Coaches were organic to an infantry platoon.
Funny thing, when I got to Korea, I discovered pretty much the same thing. When a platoon left post for an exercise, two moma-sans would fall in behind. I thought the average infantryman was heavily burdened until I saw the crap these moma-sans would carry. Two, maybe three ice chests full of cokes and goodies to sell the troops.
LOL! Yep, and I bet they always walked away with a pocket full of money and empty ice chests too.
I always felt the brass pickers would make good targets for the troops to practice shooting at live targets during live fire training.
Never went to Korea but many in my unit had been and they would tell stories of Koreans being downrange with bushel baskets so they could stand under the helos to collect the machine gun brass as it fell from the gunships. I understand much of the brass trinkets sold to GIs came from that cartridge brass.